Income Taxes (Details) - USD ($) $ in Thousands	3 Months Ended										12 Months Ended
	Dec. 31, 2019	Sep. 28, 2019	Jun. 29, 2019	Mar. 30, 2019	Dec. 31, 2018	Sep. 29, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Dec. 31, 2015	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
TCJA income tax expense [Abstract]
TCJA remeasurement of deferred tax liabilities											$ 0	$ (1,211)	$ (74,816)
TCJA tax on unremitted foreign earnings											0	7,425	215,558
TCJA foreign taxes on assumed repatriation												19,282	213,000
TCJA reversal of deferred taxes due to cancellation of repatriation plan												0	(118,887)
Total tax expense enactment of TCJA	$ 0	$ 0	$ 0	$ 0	$ 0	$ 13,496	$ 12,000	$ 0				25,496	234,855
Cumulative Impact of TCJA Remeasurement of Deferred Tax Liabilities											(76,027)
Cumulative impact of TCJA tax on unremitted foreign earnings											222,983
Cumulative impact of TCJA foreign taxes on assumed repatriation											232,282
Cumulative impact of TCJA reversal of deferred taxes due to cancellation of repatriation											(118,887)
Cumulative total tax expense enactment of TCJA											260,351
Income (loss) from continuing operations before taxes and noncontrolling interests [Abstract]
Domestic											(10,992)	(39,861)	(40,171)
Foreign											237,290	456,637	319,535
Income before taxes											226,298	416,776	279,364
Current:
Federal											9,137	18,756	180,873
State and local											415	209	108
Foreign											113,779	263,247	65,566
Total current income tax expense											123,331	282,212	246,547
Deferred:
Federal											(13,731)	(58,386)	(101,896)
State and local											(802)	(3,117)	1,538
Foreign											(47,290)	(150,470)	152,735
Total deferred income tax expense											(61,823)	(211,973)	52,377
Total income tax expense											61,508	70,239	298,924
Deferred tax assets:
Pension and other retiree obligations	48,434				43,238						48,434	43,238
Inventories	19,318				9,795						19,318	9,795
Property and equipment	0				5,888						0	5,888
Net operating loss carryforwards	119,420				128,177						119,420	128,177
Tax credit carryforwards	76,140				72,708						76,140	72,708
Other accruals and reserves	29,273				19,645						29,273	19,645
Total gross deferred tax assets	292,585				279,451						292,585	279,451
Less valuation allowance	(194,797)				(200,809)						(194,797)	(200,809)
Deferred tax assets, net	97,788				78,642						97,788	78,642
Deferred tax liabilities:
Property and equipment	(2,391)				0						(2,391)	0
Earnings not permanently reinvested	(16,448)				(65,537)						(16,448)	(65,537)
Convertible debentures	(25,219)				(32,488)						(25,219)	(32,488)
Other - net	(6,499)				(7,370)						(6,499)	(7,370)
Total gross deferred tax liabilities	(50,557)				(105,395)						(50,557)	(105,395)
Net deferred tax assets (liabilities)	47,231				(26,753)						47,231	(26,753)
Discrete Tax Items Repatriation	11,554	(2,604)	48	585	3,037	(680)	9,006	(1,316)			9,583	10,047	5,802
Discreet tax item related to tax-basis foreign exchange gain on settlement of intercompany loan											7,554
Tax effects of changes in uncertain tax positions	2,831	0	0	0	$ 0	0	0	0			2,831		1,565
Additional expected repatriation									$ 1,100,000		100,000	1,200,000
Tax Cuts and Jobs Act of 2017 BEAT Tax											2,900	0
Reconciliation of income tax expense at federal statutory rate to actual income tax provision [Abstract]
Tax at statutory rate											47,523	87,523	97,777
State income taxes, net of U.S. federal tax benefit											(301)	(2,298)	1,070
Effect of foreign operations											9,242	5,736	(54,807)
Tax on earnings not permanently reinvested											6,256	9,304	88,311
Unrecognized tax benefits											5,584	2,669	5,887
Senior convertible debenture repurchase											(1,461)	(52,312)	0
TCJA remeasurement of deferred tax liabilities											0	(1,211)	(74,816)
TCJA - transition tax on unremitted foreign earnings											0	7,425	215,558
Foreign income taxable in the U.S.											6,090	15,055	20,436
Deferred tax rate impact of corporate reorganization											(12,121)	0	0
Other											696	(1,652)	(492)
Total income tax expense											61,508	70,239	298,924
Net operating loss carryforwards [Abstract]
Discrete tax items included income tax expense											$ (799)	$ (39,428)	230,618
Corporate tax rate											21.00%
Percentage of dividends received deduction allowed on qualifying dividends paid by foreign subsidiaries											100.00%
TCJA one-time transition tax percentage on deferred foreign earnings for liquid assets					15.50%							15.50%
TCJA one-time transition tax percentage on deferred foreign earnings for illiquid assets					8.00%							8.00%
Payment period of transition tax payable on foreign earnings											8 years
Available tax credit carryforwards [Abstract]
Discrete Tax Items Repatriation	(11,554)	2,604	(48)	(585)	$ (3,037)	680	(9,006)	1,316			$ (9,583)	$ (10,047)	(5,802)
U.S. foreign tax credit carryforward (gross)	60,237										60,237
Income tax uncertainties [Abstract]
Cash repatriated during the current period											188,742	724,000	38,000	$ 46,000
Repatriation taxes paid											38,814	156,767
Expected TCJA tax payment, net	184,467				180,000						184,467	180,000
Amount of TCJA tax first installment											14,757	14,757
Unremitted foreign earnings										$ 300,000
Discrete tax items debt extinguishment	289	$ 0	$ 0	1,312	20,914	$ 0	$ 33,963	0			1,601	54,877
Net income taxes paid (refunded)											185,654	248,958	76,900
Company accrued interest and penalties related to the unrecognized tax benefits	3,561				2,887						3,561	2,887
Company recognized interest and penalties.											1,201	1,470	2,479
Unrecognized tax benefits [Roll Forward]
Balance at beginning of year				$ 21,241				$ 17,056			21,241	17,056	16,805
Addition based on tax positions related to the current year											2,383	4,332	3,911
Addition based on tax positions related to prior years											16,190	2,066	1,837
Currency translation adjustments												(984)
Currency translation adjustments											1,211		915
Reduction based on tax positions related to prior years											0	0	(1,473)
Reduction for settlements											(3,121)	(1,229)	(4,077)
Reduction for lapses of statute of limitation											(1,036)	0	(862)
Balance at end of year	36,868				$ 21,241				$ 17,056		36,868	$ 21,241	$ 17,056	$ 16,805
Minimum [Member]
Available tax credit carryforwards [Abstract]
Decrease in Unrecognized Tax Benefits is Reasonably Possible	322										322
Maximum [Member]
Available tax credit carryforwards [Abstract]
Decrease in Unrecognized Tax Benefits is Reasonably Possible	4,085										4,085
Austria [Member]
Net operating loss carryforwards [Abstract]
Net operating loss carryforward	17,485										17,485
Belgium [Member]
Net operating loss carryforwards [Abstract]
Net operating loss carryforward	158,847										158,847
Israel [Member]
Net operating loss carryforwards [Abstract]
Net operating loss carryforward	10,707										10,707
Italy [Member]
Net operating loss carryforwards [Abstract]
Net operating loss carryforward	7,325										7,325
Japan [Member]
Net operating loss carryforwards [Abstract]
Net operating loss carryforward	7,675										$ 7,675
Japan [Member] | Minimum [Member]
Net operating loss carryforwards [Abstract]
Expiration date NOL carryforward											Dec. 31, 2020
Japan [Member] | Maximum [Member]
Net operating loss carryforwards [Abstract]
Expiration date NOL carryforward											Dec. 31, 2029
Netherlands [Member]
Net operating loss carryforwards [Abstract]
Net operating loss carryforward	12,159										$ 12,159
Netherlands [Member] | Minimum [Member]
Net operating loss carryforwards [Abstract]
Expiration date NOL carryforward											Dec. 31, 2021
Netherlands [Member] | Maximum [Member]
Net operating loss carryforwards [Abstract]
Expiration date NOL carryforward											Dec. 31, 2026
The Republic of China (Taiwan) [Member]
Net operating loss carryforwards [Abstract]
Net operating loss carryforward	19,130										$ 19,130
The Republic of China (Taiwan) [Member] | Minimum [Member]
Net operating loss carryforwards [Abstract]
Expiration date NOL carryforward											Dec. 31, 2024
The Republic of China (Taiwan) [Member] | Maximum [Member]
Net operating loss carryforwards [Abstract]
Expiration date NOL carryforward											Dec. 31, 2028
Pennsylvania [Member]
Net operating loss carryforwards [Abstract]
Net operating loss carryforward	655,869										$ 655,869
Pennsylvania [Member] | Minimum [Member]
Net operating loss carryforwards [Abstract]
Expiration date NOL carryforward											Dec. 31, 2020
Pennsylvania [Member] | Maximum [Member]
Net operating loss carryforwards [Abstract]
Expiration date NOL carryforward											Dec. 31, 2039
Research Tax Credit [Member] | California [Member]
Net operating loss carryforwards [Abstract]
Tax credit carryforward, amount	15,642										$ 15,642
Available tax credit carryforwards [Abstract]
Tax Credit Carryforward	15,642										15,642
U.S. Foreign Tax Credit [Member]
Net operating loss carryforwards [Abstract]
Tax credit carryforward, amount	60,237										60,237
Available tax credit carryforwards [Abstract]
Tax Credit Carryforward	$ 60,237										$ 60,237
U.S. Foreign Tax Credit [Member] | Minimum [Member]
Net operating loss carryforwards [Abstract]
Expiration date tax credit carryforward											Dec. 31, 2028
U.S. Foreign Tax Credit [Member] | Maximum [Member]
Net operating loss carryforwards [Abstract]
Expiration date tax credit carryforward											Dec. 31, 2029